<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>   
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <el-table :data="rolesList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <!-- 在一级权限渲染中，渲染二级权限 -->
            <el-row v-for="(item,i) in scope.row.children" :key="item.id" :class="['bdbottom',i === 0?'bdtop':'']" class="vcenter">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag  closable @close="removeRightById(scope.row,item.id)">{{item.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级三级权限 -->
              <el-col :span="19">
                <el-row v-for="(items2,i2) in item.children" :key="items2.id" :class="[i2 === 0? '' : 'bdtop']" class="vcenter">
                  <!-- 二级权限 -->
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,items2.id)">{{items2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="(item3) in items2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称"  prop="roleName"></el-table-column>
        <el-table-column label="角色秒速"  prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button icon="el-icon-edit" type="primary" size="mini">编辑</el-button>
            <el-button icon="el-icon-delete" type="danger" size="mini">删除</el-button>
            <el-button icon="el-icon-setting" type="warning" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <el-dialog title="分配权限对话框" :visible.sync="showRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef" ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="showRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRight">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList:[],
      showRightDialogVisible:false,
      rightsList:[],
      treeProps:{
        label:'authName',
        children:'children'
      },
      defKeys:[],
      roleID:''
    }
  },
  created() {
    this.getRolesList()
  },
  methods:{
    async getRolesList() {
      const {data:res} = await this.$http.get('roles')
      if(res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolesList = res.data
    },
    async removeRightById(roles,rightId) {
      const confirmRes =  await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      if(confirmRes !== 'confirm') {
        return this.$message.info('用户取消了删除')
      }
      const {data:res} = await this.$http.delete(`roles/${roles.id}/rights/${rightId}`)
      if(res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      roles.children = res.data
    },
    async showSetRightDialog(role) {
      this.roleID = role.id
      const {data:res}  = await this.$http.get('rights/tree')
      if(res.meta.status !== 200) {
        return this.$message.error('获取用户权限失败')
      }
      this.rightsList = res.data
      this.getLefeKeys(role,this.defKeys)
      this.showRightDialogVisible = true
    },
    getLefeKeys(node,arr) {
      if(!node.children) {
        return arr.push(node.id)
      }else{
        node.children.forEach(element => {
          this.getLefeKeys(element,arr)
        });
      }
    },
    setRightDialogClosed() {
      this.defKeys = []
    },
    async allotRight() {
      const keys = [
      // 拿到所有全选或者半选状态下的数组
      ...this.$refs.treeRef.getCheckedKeys(),
      ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys);
      const idStr = keys.join(',')
      const {data:res} = await this.$http.post(`roles/${this.roleID}/rights`,{rids:idStr})
      if(res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.showRightDialogVisible = false
    }
  }
}
</script>

<style>
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>